:root {
    /* Color Palette */
    --primary: #0f9f78;
    --primary-hover: #087a60;
    --primary-light: #e3f6ef;
    --navigation-green: var(--primary);
    --navigation-green-hover: var(--primary-hover);
    --navigation-active: var(--primary);
    --secondary: #657084;
    --secondary-hover: #3f4a5d;
    --accent: #e88932;
    --background: #ffffff;
    --surface: #fffdf9;
    --text: #18242b;
    --text-light: #66747a;
    --ink: #17343a;
    --coral: #d96552;
    --line: #dce5df;
    --success: #10b981;
    --danger: #ef4444;
    --border: #dce5df;

    /* Typography */
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Sizing & Borders */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(24, 36, 43, 0.05);
    --shadow-md: 0 12px 28px rgba(24, 36, 43, 0.08);
    --shadow-lg: 0 24px 56px rgba(24, 36, 43, 0.14);

    /* Animation Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    height: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--background);
    background-image: none;
    color: var(--text);
    min-height: 100%;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Base Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Top Navigation Bar
   ============================================ */
.navbar {
    background-color: rgba(255, 253, 249, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(220, 229, 223, 0.9);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text);
    letter-spacing: -0.04em;
}

.nav-logo-icon {
    background: linear-gradient(135deg, var(--primary) 0%, #34d399 100%);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

.nav-logo-text {
    background: linear-gradient(100deg, var(--ink), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-logo img {
    border-radius: 10px;
    filter: drop-shadow(0 5px 8px rgba(15, 159, 120, 0.16));
}

/* ✅ NAV MENU */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    list-style: none;
}

/* ✅ NAV LINKS — RECTANGLE BOX BUTTONS */
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    background-color: var(--surface);
    border: 2px solid var(--border);
    transition: var(--transition);
    position: relative;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(24, 36, 43, 0.04);
}

/* ✅ Hover */
.nav-link:hover {
    color: var(--primary-hover);
    background-color: var(--primary-light);
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(15, 159, 120, 0.15);
}

/* ✅ Focus */
.nav-link:focus-visible {
    outline: 3px solid rgba(232, 137, 50, 0.5);
    outline-offset: 2px;
}

/* ✅ ACTIVE — solid green fill */
.nav-link.active {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), #18b487);
    border-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.32);
}

/* ✅ UNDERLINE sa active */
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 3px;
    background-color: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ✅ Hover underline (non-active) */
.nav-link:not(.active)::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 3px;
    background-color: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-link:not(.active):hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
}

/* Main Layout wrappers */
.app-content {
    flex: 1;
    padding: 48px 0 64px;
}

.landing-footer {
    flex: 0 0 auto;
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    padding: 18px 0;
    font-size: 0.8rem;
    color: var(--text-light);
    text-align: center;
}

/* Button UI Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1rem;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #18b487);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.4);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(16, 185, 129, 0.5);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--primary-light);
    color: var(--primary-hover);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.btn:focus-visible,
.nav-link:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(232, 137, 50, 0.35);
    outline-offset: 3px;
}

.btn-secondary:hover:not(:disabled) {
    background-color: #d1fae5;
    transform: translateY(-2px);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-icon-only {
    padding: 12px;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    width: auto;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
    border-radius: var(--radius-md);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* Icon Buttons */
.icon-btn {
    background: none;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text);
    background-color: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.icon-btn:hover {
    background-color: var(--background);
    transform: scale(1.05);
}

/* Segmented Controls */
.segment-container {
    margin-bottom: 24px;
}

.segmented-control {
    display: flex;
    background-color: rgba(227, 246, 239, 0.72);
    padding: 6px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.segmented-control.small {
    border-radius: var(--radius-sm);
    padding: 4px;
}

.segment-btn {
    flex: 1;
    text-align: center;
    background: none;
    border: none;
    padding: 12px 20px;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-light);
    border-radius: calc(var(--radius-md) - 2px);
    cursor: pointer;
    transition: var(--transition);
}

.segmented-control.small .segment-btn {
    padding: 8px 16px;
    font-size: 0.875rem;
    border-radius: calc(var(--radius-sm) - 2px);
}

.segment-btn.active {
    background-color: var(--ink);
    color: #f7fffb;
    box-shadow: var(--shadow-sm);
}

/* Form Controls */
.form-input {
    width: 100%;
    font-family: var(--font-family);
    font-size: 1rem;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
    outline: none;
    background-color: rgba(255, 253, 249, 0.82);
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--primary);
    background-color: var(--surface);
    box-shadow: 0 0 0 4px rgba(15, 159, 120, 0.12);
}

/* Divider */
.divider {
    border: 0;
    height: 1px;
    background-color: var(--border);
    margin: 24px 0;
}

/* Loading Spinner */
.loading-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 40px auto;
}

/* Keyframe Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.5; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.5; }
}

.pulse {
    animation: pulse 2s infinite ease-in-out;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-slide-up {
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}